package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    WorkspaceService workspaceService;
    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin,LocalDate end) {
        log.info("营业额统计实现");
        //日期
        List<LocalDate> list = new ArrayList<>();
        list.add(begin);
        while (!begin.equals(end)){
           begin =  begin.plusDays(1);
            list.add(begin);
        }
        //营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : list) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
           Double result = orderMapper.sumByMap(map);
           turnoverList.add(result == null? 0.0:result);
        }
        //转换string
        String join = StringUtils.join(list, ",");
        String join1 = StringUtils.join(turnoverList, ",");
        TurnoverReportVO turnoverReportVO = new TurnoverReportVO();
        turnoverReportVO.setTurnoverList(join1);
        turnoverReportVO.setDateList(join);
        return turnoverReportVO;
    }

    /**
     * 用户数据统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        log.info("用户数据统计实现");
        //存放日期
        List<LocalDate> list = new ArrayList<>();
        list.add(begin);
        while (!begin.equals(end)){
            begin =  begin.plusDays(1);
            list.add(begin);
        }
        //存放新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        //存放用户总数量
        List<Integer> allUserList = new ArrayList<>();

        for (LocalDate date : list) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("end",endTime);
            allUserList.add(userMapper.countByMap(map));
            map.put("begin",beginTime);
            newUserList.add(userMapper.countByMap(map));
        }
        UserReportVO userReportVO = new UserReportVO();
        userReportVO.setDateList(StringUtils.join(list,","));
        userReportVO.setNewUserList(StringUtils.join(newUserList,","));
        userReportVO.setTotalUserList(StringUtils.join(allUserList,","));
        return userReportVO;
    }

    /**
     * 订单统计实现
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        log.info("订单统计实现");
        //存放日期
        List<LocalDate> list = new ArrayList<>();
        //存放每天订单总数
        List<Integer> allList = new ArrayList<>();
        //存放每天有效订单总数
        List<Integer> validList = new ArrayList<>();
        list.add(begin);
        while (!begin.equals(end)){
            begin =  begin.plusDays(1);
            list.add(begin);
        }
        for (LocalDate date : list) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询每天订单数
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            allList.add(orderCount);
            //查询每天有效订单数
            Integer validOrder = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            validList.add(validOrder);
        }
        //计算订单总数量
        Integer total = allList.stream().reduce(Integer::sum).get();
        //有效订单总数量
        Integer validTotal = validList.stream().reduce(Integer::sum).get();

        //计算完成效率
        Double rate = 0.0;
        if(total != 0)
        {
            rate = validTotal.doubleValue()/total;
        }

        OrderReportVO build = OrderReportVO.builder()
                .dateList(StringUtils.join(list, ","))
                .orderCountList(StringUtils.join(allList, ","))
                .totalOrderCount(total)
                .validOrderCountList(StringUtils.join(validList, ","))
                .orderCompletionRate(rate)
                .validOrderCount(validTotal)
                .build();

        return build;
    }

    /**
     * 统计top10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop = orderMapper.getSalesTop(beginTime, endTime);

        List<String> names = salesTop.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String name = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String number = StringUtils.join(numbers, ",");

        SalesTop10ReportVO salesTop10ReportVO = new SalesTop10ReportVO();
        salesTop10ReportVO.setNameList(name);
        salesTop10ReportVO.setNumberList(number);
        return salesTop10ReportVO;
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map = new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status", Orders.COMPLETED);
      return orderMapper.countByMap(map);
    }
}
